Is there a pin-compatible replacement for MOC3023M?

Yes, parts like MOC3052M and MOC3021M share the same 6-DIP package and pinout. However, they are not drop-in replacements due to different electrical parameters, primarily the trigger current.

What risks should I check before replacing MOC3023M?

The main risks are functional type and trigger current. Ensure the replacement is also a 'random-phase' driver, not 'zero-cross'. Also, verify your circuit can supply the higher trigger current required by alternatives like MOC3052M (10mA) or MOC3021M (15mA).

MOC3023M Alternatives, Datasheet & Cross Reference | On Semiconductor / Fairchild

MOC3023M is a random-phase triac driver optocoupler from onsemi in a 6-DIP package, used for AC load control. Finding a substitute requires matching the random-phase function and verifying the LED trigger current.

AI replacement insight

Electrical riskmedium

Substitutes require 2-3x higher trigger current, which may not be available in the existing circuit.

Package risklow

All candidates share the same 6-DIP package and standard pinout.

Can it be replaced directly?

No direct drop-in replacement is identified. All viable alternatives require verifying the higher LED trigger current (I_FT).

Best replacement path

MOC3052M offers a voltage upgrade but requires checking the drive circuit's ability to supply 10mA.

Main risk

The primary risk is the increased LED trigger current (I_FT), which may cause the substitute part to fail to turn on.

Recommended alternatives

A random-phase driver with a higher voltage rating, but requires checking the trigger current.

View details

Alternative comparison matrix

Feature / factor	MOC3023M	MOC3052M	MOC3021M	Compatibility / risk
Package	6-DIP	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm)	6-DIP (0.300", 7.62mm) — Package is physically compatible.; MOC3021M: Package is physically compatible.
Voltage	400V	600V	400V	600V / 400V — Higher blocking voltage provides more design margin.; MOC3021M: Blocking voltage is identical.
Current	5mA	10mA	15mA	10mA / 15mA — Requires double the LED trigger current (I_FT).; MOC3021M: Requires triple the LED trigger current (I_FT), a significant difference.
Function	Random-Phase	Random-Phase	Random-Phase	Random-Phase — Both are random-phase drivers, suitable for phase control and inductive loads.; MOC3021M: Both are random-phase drivers.
Temperature	-40°C to +85°C	-40°C to +85°C	-	-40°C to +85°C — Operating temperature range is identical.

Application & sourcing insights

Questions & answers

MOC3052M is a potential alternative. It has a higher voltage rating (600V vs 400V) but requires a higher trigger current (10mA vs 5mA). The drive circuit must be checked.